Belko Royce grew up in the same neighborhood as Stan, a lost boy type who gravitated to Stan’s natural leadership and, eventually, his loving family. Belko is fiercely loyal to the Larsens and spends most of his time helping Stan with the moving company and being an unofficial uncle to the Larsen kids. Sensing the deep grief Stan is experiencing over Rosie's death, Belko offers to "take care of" Darren Richmond, "like old times." "I don't do that anymore," Stan replies. Belko later informs Stan that Bennet Ahmed is the chief suspect in Rosie's murder, and is present when Stan brutally beats the teacher. Belko becomes a suspect himself when Sarah and Holder learn that he was inside the Larsen apartment when Rosie returned home after the dance. When he learns that police are arresting Darren Richmond for the murder of Rosie Larsen, he shoots Richmond. His murder attempt fails and he is taken into custody. At the police station, he obtains a gun and takes a cop hostage, then fatally shoots himself.